It shouldn't come as a surprise that Jack and Rachel Antonoff are one of the coolest celebrity brother-sister duos out there. And if you avidly follow them on social media, you know just how close—and crazy—the pair are. We caught up with them at Brooklyn's McCarren Park and basically let them lead the show. What resulted was a hilarious, awesome interview filled with childhood stories and some great pieces of advice. Watch the video and remember: Drive safely and cut down your sugar intake.